Msen has implemented a
greylisting
system for SMTP email access to our
servers. This process delays email for 10 minutes before accepting it.
It is an attempt to block spammers who will only make one attempt at
sending email before they go on to another victim. Any legitimate
email server will retry any delayed mail, and so legitimate email
gets through, while most spam is denied. Measurements show that
93% of spam is being blocked using this method alone. Msen's other
spam blocking features can be activeated on a per account basis
from the following control panel.

Because of this new SPAM filtering process outgoing mail can be
affected for a portion of the Msen user community. Those affected
are:

Those not on Msen IP addresses/modems, Ie. cable modem users

The fix to remove the delay time is as follows:

Turn on SMTP-AUTH, so a userid/password combination is sent
with the outgoing mail. Since the password is verified, the mail
goes through immediately.

This page will show you the process of turning on SMTP-AUTH. Since
it sends a userid/password combination the same as POP3 or IMAP does,
the connection should be encrypted. The instructions on how to
use SMTP-AUTH and POP3 with SSL/TLS encryption are
on the TLS page.

Using SMTP-AUTH:

In Outlook Express for the Mail account properties, set your options to
the following with your username and servers set to your particular account.

If you are on a cable modem or in a hotel that blocks port 25 for outgoing
email, you can use the Port 587 Mail Submission protocol for SMTP.
Unlike port 25, Port 587 requires you to send your username/password to the
server to authenticate the connection.

Using TLS/SSL protects your userid/password when sent across the network for
the mail protocols. The non-SSL version of the protocols send the passwords
in the clear across the wire.
To achieve complete email privacy, use SSL/TLS to
protect your passwords, and PGP to protect the content of the
message.